Pencil



J. P. LYNN PENCIL Filed Nov. 5 1930 J'OHNP. LYNN, OF CHICAGO, ILLINOIS, ASSIGNOR T Pate ted Oct. 27, '1931 UNITED STATES;

PATENT OFFICE CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS PENCIL i Application filed November 5, 1880. Serial No. 498,502.

I tube which is mounted axially therewithin;

. vbody adjacent its lower end;

the connection between the tip and the pencil body which is axially recessed for the accommodation of certain operatin parts; and the means by which the tip is assured of smooth rotation relative to the body, of a secure frictional connection therewith, and of stability against deflection laterally thereof. These and other objects, as will hereinafter appear, are fully set forth in the accompanying drawings, in which- Figure 1 is a longitudinal section through a pencil in which is embodied the improvements of this invention; Figs. 2 and 3 are enlarged transverse sections taken, respectively, on lines 2'and 3 of Fig. l; i V c Fig. 4 is a view in perspective of a friction lining which. may be anchored within the Figs. 5 and 6 are similar views'of friction linings having slightly modified constructions;

Fig. 7 is a longitudinal section through a pencil tip and proximate body end, showing a modification in the construction of these parts;

Fig. 8 is an enlarged detail in section of the tip and body end to which it is connected, showin the construction which is illust fiited in Fig.%; and

' Fig. 9 is an enlarged transverse section taken on line f Fig. 7.

Asa practical embodiment of the invention, I" have illustrated in the accom an 'n drawings a pencil having a body w ic desirably may be made of composition mashown a lining terial adapted to be formed to shape under the influence of heat and-pressure. Such a body is ordinarily produced from .two complementary halves, as indicated b the sections :2: and y in Figs. 2 and 3. he upper end of the body may be formed with a chamberfor spare leads closed by an eraser mount ing as shown.

Extending axially for a substantial distance in the-lower portion. of the body is a chamber 10 which extends through to its lower end. This chamber is of a non-round cross section, as indicated in Fig. 2, so as to cooperate with the flattened head 11 of a screw- IlJ'U'R-O-LITE PENCIL COMPANY, 03?

threaded propeller 12 when the latter is moved longitudinally in response to a force produced by turning of a complementary screw-threaded part. 11 this manner the mitted to travel lengthwise o maining non-rotative.

The body walls surrounding the chamber near its lower end are desirably recessed to accommodate a friction lining 14 of which three itself while reforms are suggested in Figs. 4, 5, and 6. In

the constructlon shown in igs. 1 and 4, the lining walls at its upper end are slitted out at 15, the displaced material in the form of a ribbon being turned around to provide hooks or eyes 16 t ing the bod is flowed in the process of fusing the two ha ves thereof. The lining just referred to provides a mechanical bond between the body sections so as to prevent their accidental separation in case of an imperfect union. The linin isfurthermore so placed relative to the en of the body as to extend slightly therebe end, the protruded lining end being slitte as at 1'1 to provide a plurality of arcu'ate'sections or'* aws'18 which ma springradi all to a limited extent.

' 1 n the construction of Fig. 5jthe eyes 16 of the friction lining are produced b ribbons cut from the slots 17 at the'lo'wer en instead of the opposite end, as shown in,Fig. 4. These eyes areadaptedtobe anchored within the material forming the bodyf and serve to,mechanically connect the sections thereof, the same as already'described. InFig fi, I have 'which is tubular throughout that portion '0 rough which the material formpropeller is peritslength which is fitted withllll ltd

modate in flush relation with protrudes below the body end being irregularly but symmetrically formed in some such manner as thereinshown. By having three or more sides which approach the axis of the lining more closely than the connecting angles, I take advantage of the spring properties of the walls so formed to engage frictionally with an internally fitted part, as will presently be described.

For purposes ofa pearance, face of the pencil be be recessed annularly as at 20 the outer sun so as to accomthe remainder of its surface the upper end of a hollow tip B which is fitted over and upon the body. The walls of the tip may be inclined as at 21 from a point of minimum diameter adjacent the writing end to a point near its opposite end where the walls are straightened out cylindrically as at 22. The body end upon which the tip is fitted besides being recessed slightly, as already noted, may also be tapered somewhat as at 23 to conform to the size and shape of the tip walls. With the parts so constructed the tip is adapted to be fitted upon the body end with the interior faces of its walls in the upper region closely approaching the proximate walls of the body (see Fig. 8). The top edge of the tip may abut an annular shoulder 24 formed by the recessing of its surface, and when so positioned assures a corelationship between the walls of the tip and body as above indicated. This is desirable as affording a means by which to resist any lateral pressure tending todeflect the tip out f axial alignment with the body.

The tip may desirably be made of metal having its walls drawn or otherwise produced to the desired size and shape. At its lower end, the tip walls are slitted at two or more places 25 to provide spring sections for gripping a lead C that is fed through the tip.

ti and extending axially therefrom to fit within the friction lining of the body. To support and secure the tube within the tip, the walls of the latter may be somewhat thickened in its lower region, as at 27, by an excess of material which is disposed upon its interior surface, In "the region. ofthis thickened wall portion, the tip is formed 1 with an inner cylindrical surface 28 forming a seat wherein may be fitted the lower end of the guide tube. To retain the tube fixedly within the seat, one or more indentations 29 in the walls of the tip may be formed with a punch or prick, these indentations being transferred into the walls of the tube whereby to lock the one inseparably and non-rotatably to the other. By the construction described, the tube is both secured and steadied in axial relation with the tip.

The internal diameter of the tube issuch body by these spring fingers y near its lower end may lead is supported by a guide tube 26 as at 30, are provided with internal threads which coact with the propeller. Externally the walls of the tube are engaged by the spring fingers 18 of the friction lining. A sufficient friction. is maintained upon the to retain the tip securely in place upon the body end.

In operation a lead is expelled through the tip by advance of the propeller consequent upon rotation of the tip relative to the body. With exhaustion of the lead, the tip, together with the propeller, may be withdrawn from the body by the application of a force suflicient to overcome the frictional gripping of the spring fingers with the guide tube. In this operation the propeller comes out with the tip and may be unscrewed therefrom to permit insertion of a new lead, or the latter, ifdesired, may be introduced through the writing end of the tip. Thereafter the tip may be replaced upon the body end, the spring fingers again taking hold of the guide tube.

to retain the tip in place.

It is possible to modify the construction somewhat and yet make use of the features of improvement herein disclosed. An example of such an alternative construction is set forth in Figs. struction the body adjacent its shoulder 24- may be slitted diametrically as at 35, pro viding on opposite sides thereof sections of the body which have capacity for slight springing movement toward or from each other. In this construction no friction lining is shown although it may optionally be employed. The. tip walls engage directly with the lower body end, the sections whereof are compressible, as required to accommodate the tip. In this construction there may be sufficient friction maintained to sustain the tip in place. The tip may be rotated freely as necessary for advancement of the propeller. and may also upon the application of sufiicient force, be disengaged from the body whose split end serves normally to hold the tip in place. In this embodiment of the invention, the guide tube is supported within a mounting which is formed by a cylindrical inner surface of the tip produced by straightening a section 36 of its walls intermediately of other inclined sections. By this. means I obtain the same. result as with the thickened wall construction shown in Fig. 1. Also, above the upper end of the guide tube, I may arrange within the body chamber 10 a lining 37 in the form of a narrow channel open along one side 38with opposite bulges 39 accom modating between them the propeller 12 whose head is receivable lengthwise of the channel, as shown best in Fig. 9. By this construction I utilize flat stock which is bent to the required channel form to furnish a lining interiorly of the pencil body whereby to assure a correct and perfect slideway for the propeller and its head. Such a lining can be produced at much less expense than if formed from a tube, and dispenses with the necessity of providing a special non-round form of body chamber clear from end to end,

bly below the top edge of the tipwhich may axial lead guide tube adap mg when entered t within said opening,

abut the body shoulder to resist deflection from true axial position. For these reasons stability of the t1p at all times is assured. I claim:

' 1. A pencil comprising a body havingan axial opening, a lead guide tube receivable means for propelling a lead in the guide tube, and resllient means carried by the body for'securing the tube in the opening. H V

2. A pencil comprising a body having an,

axial opening, a lead guide tube receivable within the opening, means for propelling leads in the uide tube, resilient means carried by the od for securin said tube in the opening, an a tip carried y the tube.

3. A pencil in which is included a body having an axial chamber open at one end with a lining fitted partly withinthe chamber, thelining end protruded from the chamber being formed. to yield radially under pressure, and an operating unit for. the pencil in the form of a hollow ti having an d to receive 1protruded end of the linerewithin in consequence of the tip bein ap lied to the chambered end of the penci bod w 4. A pencil having a body one end of which is formed with an axial chamber wherein is a lining slotted to provide radially movagale 1n pressure from the spring sections, a tubeclosely fitted wit t e lining and frictionally engaged by the s ringb sections thereof, and a tip 'oined to g 'eltu e and connected thereby to t e pencil o y.

5. A pencil'having a body one end of which is formed with an axialchamber wherein-is a lining protruding in part beyond the'body end at which point it is slotted to provide spring jaws, and a hollow tip mounting a tubereceivable within the limng to be frictionall engaged lay the jaws, the tip when applie to the b0 y space wherein the jaws are disposed.

6. A (pencil comprising a body havingai longitu inal opemng, a lead guide tube exerting fwallsof the'ti providing an enclosed tatably with the body.

adapted to: enter therein, a lining in said opening and having jaws extending beyond said openin for frictionally engaging said tube to retaln it in the body, and a-tip having a cylindrical inner portion engaging an end of said tube to secure the tube and tip together.

7 A pencil comprising a body having'a longitudinal opening, a lead guide tube adapted to enter therein, a lining in said opening and having aws extending beyond said opening for frictionally engaging said form of atapered tip having one portion of' its walls extended cylindrically to provide a-bearing of substantial length wherein is...

immovably mounted a lead guide tube deriving axial support solely from its frictional engagement with the cylindrical tip walls,

and means cooperating with the body and tube for propelling a lead through'the tip.

9. A pencil having a body axially chambered at one end and provided with a tubular lining therein, an operating unit for the pencil in the form of a hollow tip mounting an axial lead guide tube telescopically. received within the lining to derivebearing therefrom, and means disposed exteriorly of the body chamber within the hollow of the tip providing a s ring engagement between the lining and tu ewhereby to support the tip rotatably, but 'releasabl inplace upon the body end. I

' 10. A pencil having a body axially chambered at one end and providedowith a tubular lining therein, an operating unit for the pencil in the formof ahollow tip mounting an axial lead guide tube telescopically re- ,ceived within the-lining to derive bearing therefrom, and spring means extended from the lining to a pointexteriorly of the body chamber and within the confines of the tip a lateral pressure against the tube whereby releasably, in place upon the body end. 7

11. A pencil having a body one end of which is axially chambered to receive therein a lead guide tube axially extended from-and joined to a tapered tip adapted to be fitted upon and over the chambered body end, the

spring means associated with the body adjacent its chambered end and disposed within the space interiorl of the-tip in frictional engagement with t e tube, the spring means servlng to connect the tip removably and r0- adjacent its lai' er end being- .spaced from t e tube, and radially movable ioo tov support the tip rotatably, but

' tion of its walls internally I body to one end at Q through the tip.

,tion extending also the guide tube gagement with the latter to releasably connect the tip to the body,

12. A pencil having a body to one end of which is applied an operating unit in the form oi a hollow tapered tip having one por extended cylindrically to provide a bearing of substantial length wherein is fitted a cylindrical lead guide tube deriving axial support from its mounting within the cylindrical wall portion of the tip, and means cooperating with the bfidy and tip for propelling a lead through t e tip.

13. A. pencil having a body to one end of which is applied an operating unit in the form of a hollow tapered tip having one portion of itswalls internally extended cylindrically to provide a bearing of substantial length wherein is fitted a cylindrical lead guide tube deriving axial support from its mounting within the cylindrical wall portion of the tip, there being an indentation in the tip wall extending also into the tube wall to lock the one inseparably and non-rotatably to the other, and means cooperating with the body and tip for propelling a lead through the tip. 7

14. A pencil having an axially chambered which is applied an opthe form of a hollow tapered mounting a lead guide tube the Wall of w ich for a limited distance lies adjacent that of the tip wherein is formed an indentainto the tube wall to lock the one inseparably and non-rotatably to the other, and means extending into the body chamber cooperating with the body and tube for-propelling a lead through the tip.

15. A pencil having an axially chambered body to one end of which is telescopically crating unit in fitted an operating unit in the form of a hollow tapered tip havin its walls coacting circumferentially with the pencil body to limit the movement of one upon the other, a guide tube mounted axially in the tube and extended therefrom in rogressively spaced relation to its walls or fitting within the body chamber, means carried by the body and disposed within the tip between its walls and therewithin in frictional enthe tip being rotatable thereupon, and means cooperatin with the body and tip for propelling a lea JOHN P. LYNN. 

